brake lever to brake light wiring questions

[breath_easy13]

I want to run the headlight, brake light to brake lever, LED turnsignals and handle bar switch to a rechargeable 12v. No, i dont want to buy a new flywheel and coil system for the motor. I would rather swap out 2 12v and leave the engine alone. So I know little to nothing about electrical work, so im hoping someone could help me write up a wiring diagram.

Parts List
LED Tailight/turn signal/ Break light (very cool)
https://www.amazon.com/dp/B01GJGCR9...olid=2F5T1WZXOVPYZ&psc=1&ref_=lv_ov_lig_dp_it
headlight
https://www.amazon.com/dp/B01GJGCR9...olid=2F5T1WZXOVPYZ&psc=1&ref_=lv_ov_lig_dp_it
switch
https://www.amazon.com/Handlebar-Ke...al+switch&qid=1581219383&s=automotive&sr=1-23
battery
https://www.ebay.com/i/323420735091?rt=nc&_trkparms=aid=1110001&algo=SPLICE.SIM&ao=2&asc=20160908110712&meid=baf77293e5d94754b2d060cd744ace2c&pid=100677&rk=9&rkt=30&mehot=pp&sd=233240961574&itm=323420735091&pmt=0&noa=1&pg=2386202
Im assuming i need some way to put it all together so i found this
https://www.amazon.com/DZG-Universal-Harness-Motorcycle-Auxiliary/dp/B07GTNHNMN/ref=sr_1_6?crid=3CZ5CUGI5NKIJ&keywords=motorcycle+wiring+kit&qid=1581219810&sprefix=motorcyle+wiring+,aps,155&sr=8-6

 

[Loop]

Amazon sells a set of brake handles made for e bikes that have a switch built in that can be used to turn on and off brake lights